{"version":"1.0","type":"rich","title":"Difference Chart","description":"This chart compares daily temperatures in New York and San Francisco over a four-month period using a bivariate area chart. Two overlaid lines show the temperature series for each city, while the area between them is filled in green when New York is warmer and red when San Francisco is warmer, using clipping to alternate colors based on the difference. The visualization is rendered in SVG with D3 v4 and is a modern update to an original block by Mike Bostock. The data is loaded from a TSV file containing date, New York, and San Francisco temperature values.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-401d3007d78275bfa331994b8885f09c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}